Portable digital electronic pocket practice box

Abstract

The utility model discloses a portable digital electronic pocket practice box, which is characterized in that a box body comprises a lower box body and an upper cover body, a lifting base is arranged in an accommodating cavity of the lower box body, a lifting assembly is connected above the lifting base, a bearing frame is arranged above the lifting assembly, an integral substrate is connected above the bearing frame, and the integral substrate is arranged above the lifting assembly. A 14-pin chip area, a nixie tube display area, a 16-pin chip area, a common cathode LED area, a high-low level output area, a non-polar capacitor area, a polar capacitor area, a coarse tuning potentiometer area, a microphone area, an expansion area, an active buzzer area, an adjustable non-polar capacitor area, a fixed value resistor area, a power supply area, a fine tuning potentiometer area, a CP pulse area and an 8-pin chip area are integrated on the substrate. According to the utility model, a plurality of types of component modules are integrated on one substrate, and a pin plugging mode and a natural ventilation heat dissipation structure are adopted, so that a more concentrated and light portable structure is optimized.

Description

TECHNICAL FIELD

[0001] The utility model relates to teaching equipment technical field, and specifically belongs to a portable digital electronic pocket practice box. BACKGROUND

[0002] Due to the progressive teaching method requirement of school teaching knowledge points, the digital circuit experiment in school is generally used by single circuit alone or used by multiple circuits together. Whether it is used by single circuit or used by multiple circuits together, it is fixedly used in combination. Therefore, the corresponding prior art portable circuit practice box also generally adopts a relatively fixed circuit design architecture, the function module category of the internal circuit is less, the circuit element configuration is relatively fixed, the element category selection is less, and complex multiple cross experiments need to be operated on the professional test box equipment in the laboratory, which greatly limits the implementation and interest of students in overall experiment composite use after learning multiple experiment categories, and is not conducive to consolidating and enriching the experiment content of students.

[0003] Based on the above problems, the utility model aims at developing a portable digital electronic pocket practice box with multiple element module integration, integrating the matched basic circuit components used in teaching experiments into a substrate in a multi-module manner, making it convenient to carry, and adopting a pin plug-in mode and a natural ventilation heat dissipation structure to adapt to a more concentrated and portable structure. UTILITY MODEL CONTENT

[0004] In order to solve the above technical problems, the utility model provides a portable digital electronic pocket practice box, including the box body, the box body includes the lower box body and the upper cover body, the accommodating cavity in the lower box body is provided with the lifting base, the upper side of the lifting base is connected with the lifting assembly, the upper side of the lifting assembly is provided with the bearing frame, the upper side of the bearing frame is connected with the integral substrate, the substrate is integrally provided with 14 pin chip area, nixie tube display area, 16 pin chip area, common cathode LED area, high and low level output area, non-polarity capacitor area, polarity capacitor area, coarse adjustment potentiometer area, microphone area, expansion area, active buzzer area, adjustable non-polarity capacitor area, fixed value resistor area, power supply area, fine adjustment potentiometer area, CP pulse area and 8 pin chip area, each of the 14 pin chip area, nixie tube display area, 16 pin chip area, common cathode LED area, high and low level output area, non-polarity capacitor area, polarity capacitor area, coarse adjustment potentiometer area, adjustable non-polarity capacitor area, fixed value resistor area, fine adjustment potentiometer area and 8 pin chip area is provided with multiple groups of area function modules; the 14 pin chip area, 16 pin chip area and 8 pin chip area are used for inserting 14 pin, 16 pin and 8 pin digital circuit chips;

[0005] Also includes external circuit, the external circuit is respectively electric communication one or more of the 14 pin chip area, the nixie tube display area, the 16 pin chip area, the common cathode LED area, the high low level output area, the non-polarity capacitor area, the polarity capacitor area, the coarse adjustment potentiometer area, the adjustable non-polarity capacitor area, the fixed value resistance area, the fine adjustment potentiometer area, the 8 pin chip area.

[0006] Preferably, the lifting base comprises a bent rib plate connected to the bottom of the lower box, the bent rib plate is respectively connected to the main support rod and the auxiliary support rod through a pin shaft, the middle part of the main support rod is provided with a waist-shaped hole, the waist-shaped hole is connected to the other end of the auxiliary support rod through a pin shaft, the upper end of the main support rod is connected to a bearing frame, the bearing frame is provided with a movable block corresponding to the two sides of the main support rod, the inside of the movable block is threadedly connected to a screw rod, the other end of the screw rod is connected to a nut and a rotating handle, and the nut is fixedly connected to the front side of the bearing frame.

[0007] Preferably, the nixie tube display area comprises an electrically connected decoder chip, a nickel-plated pure copper 2MM banana socket, an 0805 chip resistor, a common cathode nixie tube and a six-grade dial switch.

[0008] Preferably, the common cathode LED area comprises an electrically connected light-emitting diode, an 0805 chip resistor with a resistance of 1K, and a nickel-plated pure copper 2MM banana socket; the high low level output area comprises an electrically connected three-grade dial switch and a nickel-plated pure copper 2MM banana socket; the non-polarity capacitor area comprises a non-polarity capacitor and a nickel-plated pure copper 2MM banana socket; and the polarity capacitor area comprises a direct-inserted aluminum electrolytic capacitor and a nickel-plated pure copper 2MM banana socket.

[0009] Preferably, the coarse adjustment potentiometer area comprises a coarse adjustment potentiometer and a nickel-plated pure copper 2MM banana socket, and the interface of the nickel-plated pure copper 2MM banana socket is correspondingly connected to the pin of the coarse adjustment potentiometer.

[0010] Preferably, the microphone area comprises a condenser electret microphone and a nickel-plated pure copper 2MM banana socket, the positive electrode of the condenser electret microphone is connected to one side pin of the nickel-plated pure copper 2MM banana socket, and the negative electrode is connected to the other side pin; and the active buzzer area comprises an active buzzer and a nickel-plated pure copper 2MM banana socket, the positive electrode of the active buzzer is connected to one end pin of the interface of the nickel-plated pure copper 2MM banana socket, and the negative electrode is connected to the other end pin.

[0011] Preferably, the adjustable non-polarity capacitor area comprises an electrically connected adjustable capacitor and a nickel-plated pure copper 2MM banana socket; and the fixed value resistance area comprises an electrically connected resistor and a nickel-plated pure copper 2MM banana socket.

[0012] Preferably, the power supply area includes electrically connected recoverable fuse, 2P connector, edgeless positioning post female seat, resistance, light emitting diode, single row pin socket, single row pin and nickel-plated pure copper 2MM banana socket.

[0013] Preferably, the fine adjustment potentiometer area includes potentiometer and nickel-plated pure copper 2MM banana socket, the pin of the potentiometer and the nickel-plated pure copper 2MM banana socket are connected in corresponding interface.

[0014] Preferably, the CP pulse area includes electrically connected two-stage switch, resistance, nickel-plated pure copper 2MM banana socket and NAND gate chip, the expansion area includes 8P row pin and nickel-plated pure copper 2MM banana socket, the nickel-plated pure copper 2MM banana socket is connected with the pin of the 8P row pin in sequence.

[0015] Compared with the prior art, the utility model has the advantages that: the utility model sets up the lifting frame convenient for natural ventilation in the narrow space of the practice box, and sets up the circuit board of the integral multiple circuit module area, so that the teaching function is complete, most of the basic and design experiments of digital electronic technology can be realized, and part of comprehensive practice projects can be expanded, multiple circuits can be used in combination, different functions can be completed, and the experiment content of students is enriched; when the utility model is used, the lifting mechanism can be lifted to improve the ventilation space of the circuit board, and the circuit elements are protruded from the practice box body, which is beneficial to dispersing the high heat dissipation of the complex circuit in time without setting up the power heat dissipation mechanism, preventing damage and interference to high-density components, meanwhile, lifting the experiment panel is also beneficial to clearly showing the experiment process to students in the classroom; after the experiment is completed, the lifting mechanism retracts the experiment panel into the accommodating cavity of the practice box, so that the utility model is convenient to store, small in size and light in weight, and convenient to carry. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is the structural schematic diagram of this embodiment;

[0018] Figure 2 It is the circuit board schematic diagram of this embodiment;

[0019] Figure 3 It is the lifting assembly structural schematic diagram of this embodiment;

[0020] Figure 4is a structural schematic diagram of a 14-pin chip area of the present embodiment;

[0021] Figure 5 is a structural schematic diagram of a digital tube area of the present embodiment;

[0022] Figure 6 is a structural schematic diagram of a 16-pin chip area of the present embodiment;

[0023] Figure 7 is a structural schematic diagram of a common cathode LED area of the present embodiment;

[0024] Figure 8 is a structural schematic diagram of a high-low level output area of the present embodiment;

[0025] Figure 9 is a structural schematic diagram of a non-polarity capacitor area of the present embodiment;

[0026] Figure 10 is a structural schematic diagram of a polarity capacitor area of the present embodiment;

[0027] Figure 11 is a structural schematic diagram of a coarse adjustment potentiometer area of the present embodiment;

[0028] Figure 12 is a structural schematic diagram of a microphone area of the present embodiment;

[0029] Figure 13 is a structural schematic diagram of an expansion area of the present embodiment;

[0030] Figure 14 is a structural schematic diagram of an active buzzer area of the present embodiment;

[0031] Figure 15 is a structural schematic diagram of a non-polarity adjustable capacitor area of the present embodiment;

[0032] Figure 16 is a structural schematic diagram of a fixed resistor area of the present embodiment;

[0033] Figure 17 is a structural schematic diagram of a power supply area of the present embodiment;

[0034] Figure 18 is a structural schematic diagram of a fine adjustment potentiometer area of the present embodiment;

[0035] Figure 19 is a structural schematic diagram of a CP pulse area of the present embodiment;

[0036] Figure 20 is a structural schematic diagram of an 8-pin chip area of the present embodiment.

[0037] 1, 14-pin chip area, 2, digital tube display area, 3, 16-pin chip area, 4, common cathode LED area, 5, high and low level output area, 6, non-polar capacitor area, 7, polar capacitor area, 8, coarse adjustment potentiometer area, 9, microphone area, 10, expansion area, 11, active buzzer area, 12, adjustable non-polar capacitor area, 13, fixed resistor area, 14, power supply area, 15, fine adjustment potentiometer area, 16, CP pulse area, 17, 8-pin chip area, 18, box, 1801 lower box, 1802, upper cover, 19, lifting base, 1901, bending rib plate, 20, lifting assembly, 21, main support rod, 22, auxiliary support rod, 23, waist-shaped hole, 24, bearing frame, 25, movable block, 26, screw 26, 27, rotating handle, 28, base plate. DETAILED DESCRIPTION

[0038] The specific embodiments of the present application will be further described below in conjunction with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the present application, and cannot be used to limit the protection scope of the present application.

[0039] As Figures 1 to 3As shown, the portable digital electronic pocket practice box of the embodiment is used for connecting digital circuits, which comprises a box body 18 including a lower box body 1801 and an upper cover body 1802. A lifting base 19 is arranged in the accommodating cavity of the lower box body. The lifting base 19 is connected with a lifting assembly 20 above. The lifting base 19 comprises bent rib plates 1901 connected with two sides of the bottom of the lower box body. The bent rib plates 1901 are respectively connected with a main support rod 21 and an auxiliary support rod 22 through pin shafts. A waist-shaped hole 23 is arranged in the middle of the main support rod 21. The waist-shaped hole 23 is connected with the other end of the auxiliary support rod 22 through a shaft pin. The upper end of the main support rod 21 is connected with a bearing frame 24. The bearing frame 24 is provided with movable blocks 25 corresponding to the two sides of the main support rod 21. The movable blocks 25 are internally threadedly connected with screw rods 26. The other ends of the screw rods 26 are connected with nuts and rotating handles 27. The nuts are fixedly connected with the front side of the bearing frame 24. The upper side of the bearing frame 24 is connected with an integral substrate 28. The substrate 28 is integrally provided with 14-pin chip areas 1, Nixie tube display areas 2, 16-pin chip areas 3, common cathode LED areas 4, high and low level output areas 5, non-polarity capacitor areas 6, polarity capacitor areas 7, coarse adjustment potentiometer areas 8, microphone areas 9, expansion areas 10, active buzzer areas 11, adjustable non-polarity capacitor areas 12, fixed value resistor areas 13, power supply areas 14, fine adjustment potentiometer areas 15, CP pulse areas 16 and 8-pin chip areas 17. Each of the above module areas is respectively provided with multiple groups of function modules of the areas. The 14-pin chip areas 1, 16-pin chip areas 3 and 8-pin chip areas 17 are used for inserting 14-pin, 16-pin and 8-pin digital circuit chips. Each element pin is led out of a jack for insertion and connection. The embodiment further comprises an external circuit which is in electrical communication with one or more of the above areas.

[0040] As shown in the figure, Figure 4 The 14-pin chip area comprises copper narrow body 14P chip seats and nickel-plated pure copper 2MM banana sockets. U1 and U2 are copper narrow body 14P chip seats. The 1-7 pins of J2-J5 are divided into interfaces corresponding to one nickel-plated pure copper 2MM banana socket.

[0041] The 1-7 pins of J2 are sequentially connected with the 1-7 pins of the 14-pin chip U1.

[0042] The 1-7 pins of J3 are sequentially connected with the 8-14 pins of the 14-pin chip U1.

[0043] The 1-7 pins of J4 are sequentially connected with the 1-7 pins of the 14-pin chip U2.

[0044] The 1-7 pins of J5 are sequentially connected with the 8-14 pins of the 14-pin chip U2.

[0045] As Figure 5 shown, the digital tube display area includes a CD4511BM decoder chip with model SOP-8, a nickel-plated pure copper 2MM banana socket, an 0805 chip resistor, a 0.56-inch 1-bit common cathode digital tube, and a 2.54mm six-grade dial switch.

[0046] Among them, the 1-4 pins of J1, J6, J23, J24, J45 and J47 correspond to a nickel-plated pure copper 2MM banana socket interface;

[0047] The 1-6 pins of the six-grade dial switch S4 are connected to VCC;

[0048] The 1-4 pins of J1 are connected to the DA, DB, DC and DD pins of the decoder chip U3 in sequence, the LT pin and the BI pin of the decoder chip U3 are connected to the 12 pin of the six-grade dial switch S4, the 9-15 pins of the decoder chip U3 are connected to the 0805 chip resistors with a resistance of 330 ohms in sequence, the other end of R1 is connected to the 7 pin of the digital tube led1, the other end of R3 is connected to the 6 pin of the digital tube led1, the other end of R5 is connected to the 4 pin of the digital tube led1, the other end of R7 is connected to the 2 pin of the digital tube led1, the other end of R9 is connected to the 1 pin of the digital tube led1, the other end of R11 is connected to the 9 pin of the digital tube led1, the other end of R13 is connected to the 10 pin of the digital tube led1, the 5 pin and the 8 pin of the decoder chip U3 are grounded, and the 16 pin is connected to the 12 pin of the six-grade dial switch S4.

[0049] The 1-4 pins of J6 are connected to the DA, DB, DC and DD pins of the decoder chip U4 in sequence, the LT pin and the BI pin of the decoder chip U4 are connected to the 8 pin of the six-grade dial switch S4, the 9-15 pins of the decoder chip U4 are connected to the 0805 chip resistors with a resistance of 330 ohms in sequence, the other end of R2 is connected to the 7 pin of the digital tube led2, the other end of R4 is connected to the 6 pin of the digital tube led2, the other end of R6 is connected to the 4 pin of the digital tube led2, the other end of R8 is connected to the 2 pin of the digital tube led2, the other end of R10 is connected to the 1 pin of the digital tube led2, the other end of R12 is connected to the 9 pin of the digital tube led2, the other end of R14 is connected to the 10 pin of the digital tube led2, the 5 pin and the 8 pin of the decoder chip U4 are grounded, and the 14 pin is connected to the 8 pin of the six-grade dial switch S4.

[0050] The 1-4 pins of J23 are connected to the DA, DB, DC, DD pins of the decoder chip U13 in turn, the LT pin and the BI pin of the decoder chip U13 are connected to the 9 pin of the six-grade dial switch S4, the 9-15 pins of the decoder chip U13 are connected to the 0805 chip resistors with the resistance of 330 ohms in turn, the other end of R15 is connected to the 7 pin of the digital tube led3, the other end of R16 is connected to the 6 pin of the digital tube led3, the other end of R18 is connected to the 4 pin of the digital tube led3, the other end of R20 is connected to the 2 pin of the digital tube led3, the other end of R22 is connected to the 1 pin of the digital tube led3, the other end of R24 is connected to the 9 pin of the digital tube led3, the other end of R26 is connected to the 10 pin of the digital tube led3, the 5 pin and the 8 pin of the decoder chip U4 are grounded, and the 14 pin is connected to the 9 pin of the six-grade dial switch S4.

[0051] The 1-4 pins of J24 are connected to the DA, DB, DC, DD pins of the decoder chip U14 in turn, the LT pin and the BI pin of the decoder chip U14 are connected to the 10 pin of the six-grade dial switch S4, the 9-15 pins of the decoder chip U14 are connected to the 0805 chip resistors with the resistance of 330 ohms in turn, the other end of R17 is connected to the 7 pin of the digital tube led4, the other end of R19 is connected to the 6 pin of the digital tube led4, the other end of R21 is connected to the 4 pin of the digital tube led4, the other end of R23 is connected to the 2 pin of the digital tube led4, the other end of R25 is connected to the 1 pin of the digital tube led4, the other end of R27 is connected to the 9 pin of the digital tube led4, the other end of R30 is connected to the 10 pin of the digital tube led4, the 5 pin and the 8 pin of the decoder chip U14 are grounded, and the 14 pin is connected to the 10 pin of the six-grade dial switch S4.

[0052] The 1-4 pins of J45 are connected to the DA, DB, DC, DD pins of the decoder chip U15 in turn, the LT pin and the BI pin of the decoder chip U15 are connected to the 11 pin of the six-grade dial switch S4, the 9-15 pins of the decoder chip U15 are connected to the 0805 chip resistors with the resistance of 330 ohms in turn, the other end of R41 is connected to the 7 pin of the digital tube led5, the other end of R44 is connected to the 6 pin of the digital tube led5, the other end of R46 is connected to the 4 pin of the digital tube led5, the other end of R48 is connected to the 2 pin of the digital tube led5, the other end of R56 is connected to the 1 pin of the digital tube led5, the other end of R58 is connected to the 9 pin of the digital tube led5, the other end of R61 is connected to the 10 pin of the digital tube led5, the 5 pin and the 8 pin of the decoder chip U15 are grounded, and the 14 pin is connected to the 11 pin of the six-grade dial switch S4.

[0053] The 1-4 pins of J47 are connected to the DA, DB, DC, DD pins of the decoder chip U16 in sequence, the LT pin and the BI pin of the decoder chip U16 are connected to the 12 pin of the six-gear dial switch S4, the 9-15 pins of the decoder chip U16 are connected to the 0805 chip resistors with a resistance of 330 ohms in sequence, the other end of R43 is connected to the 7 pin of the digital tube led6, the other end of R45 is connected to the 6 pin of the digital tube led6, the other end of R47 is connected to the 4 pin of the digital tube led6, the other end of R55 is connected to the 2 pin of the digital tube led6, the other end of R57 is connected to the 1 pin of the digital tube led6, the other end of R59 is connected to the 9 pin of the digital tube led6, the other end of R62 is connected to the 10 pin of the digital tube led6, the 5 pin and the 8 pin of the decoder chip U16 are grounded, and the 14 pin is connected to the 12 pin of the six-gear dial switch S4.

[0054] The 16-pin chip area includes a copper narrow body 16P chip seat and a nickel-plated pure copper 2MM banana socket, as shown in Figure 6 The U7-U12 are copper narrow body 14P chip seats, and the 1-8 pins of J11-J22 are divided into interfaces corresponding to a nickel-plated pure copper 2MM banana socket,

[0055] The 1-8 pins of J11 are connected to the 1-8 pins of the 16-pin chip seat U7 in sequence,

[0056] The 1-8 pins of J12 are connected to the 9-16 pins of the 16-pin chip seat U7 in sequence,

[0057] The 1-8 pins of J13 are connected to the 1-8 pins of the 16-pin chip seat U8 in sequence,

[0058] The 1-8 pins of J14 are connected to the 9-16 pins of the 16-pin chip seat U8 in sequence,

[0059] The 1-8 pins of J15 are connected to the 1-8 pins of the 16-pin chip seat U9 in sequence,

[0060] The 1-8 pins of J16 are connected to the 9-16 pins of the 16-pin chip seat U9 in sequence,

[0061] The 1-8 pins of J17 are connected to the 1-8 pins of the 16-pin chip seat U10 in sequence,

[0062] The 1-8 pins of J18 are connected to the 9-16 pins of the 16-pin chip seat U10 in sequence,

[0063] The 1-8 pins of J19 are connected to the 1-8 pins of the 16-pin chip seat U11 in sequence,

[0064] The 1-8 pins of J20 are connected to the 9-16 pins of the 16-pin chip seat U11 in sequence,

[0065] The 1-8 pins of J21 correspond to the 1-8 pins of the 16-pin chip socket U12 in sequence,

[0066] The 1-8 pins of J22 correspond to the 9-16 pins of the 16-pin chip socket U12 in sequence.

[0067] As shown in Figure 7 , the common cathode LED area is composed of 0805 model light emitting diodes, 0805 chip resistors with a resistance of 1K, and nickel-plated pure copper 2MM banana sockets. The 1-12 pins in JP2 each represent a nickel-plated pure copper 2MM banana socket interface.

[0068] R42, R60, R63, R64, R67, R68, R69, R70, R74, R75, R76, R77 correspond to the anodes of the D2-D13 light emitting diodes, and the other ends of R42, R60, R63, R64, R67, R68, R69, R70, R74, R75, R76, R77 correspond to the 1-12 pins of P2, and the cathodes of the light emitting diodes D2-D13 are grounded.

[0069] The high-low level output area includes a MTS-103 three-position toggle switch and a nickel-plated pure copper 2MM banana socket. As shown in Figure 8 , S1-S13 are MTS-103 three-position toggle switches, and J55-J60 and J64, J65, J68-J71 are nickel-plated pure copper 2MM banana socket interfaces. The pin 1 of S1-S13 is connected to VCC, the pin 3 is connected to GND, and the pin 2 is connected to OUT0-OUT11 in sequence.

[0070] The non-polar capacitor area includes 0805 non-polar capacitors and nickel-plated pure copper 2MM banana sockets. As shown in Figure 9 , C1-C6 are 0805 non-polar capacitors with sizes of 10pf, 22pf, 47pf, 1nf, 10nf, and 100nf, and J37-J42 are nickel-plated pure copper 2MM banana socket interfaces with pins 1-2. The pins 1 and 2 of J37-J42 are connected to the two ends of C1-C6 in sequence.

[0071] The polar capacitor area includes direct insertion aluminum electrolytic capacitors and nickel-plated pure copper 2MM banana sockets. As shown in Figure 10As shown, C10-C17 are through-hole aluminum electrolytic capacitors with capacitance values ​​of 0.1uf, 1uf, 10uf, 47uf, 100uf, 220uf, 470uf, and 1000uf. Pins 1 and 2 of J28-J36 are nickel-plated pure copper 2mm banana plug interfaces. Pin 1 of J29-J36 is connected to the positive terminal of through-hole electrolytic capacitors C10-C17 in sequence, and pin 2 is connected to the negative terminal of through-hole electrolytic capacitors C10-C17 in sequence.

[0072] The coarse adjustment potentiometer area includes a model RM065 coarse adjustment potentiometer and a nickel-plated pure copper 2mm banana plug, such as... Figure 11 As shown, pins 1-3 of J61 and J62 are nickel-plated pure copper 2mm banana plug interfaces, and R65 and R66 are RM065 coarse adjustment potentiometers with a value of 200K ohms each. Pins 1-3 of R65 and R66 are connected to pins 1-3 of J61 and J62 respectively.

[0073] The microphone area includes a 52dB condenser electret microphone and a 2mm nickel-plated pure copper banana plug, such as... Figure 12 As shown, M1 is a 52dB condenser electret microphone, and the pins of J74 are nickel-plated pure copper 2mm banana plug interfaces. The positive terminal of the 52dB condenser electret microphone is connected to pin 1 of J74, and the negative terminal is connected to pin 2 of J74.

[0074] The extension area is used to connect external components, such as... Figure 13 As shown, it includes a 2.54mm 8P header and a nickel-plated pure copper 2mm banana plug. J54 is a 2.54mm 8P header, and pins 1-8 of JP1 are nickel-plated pure copper 2mm banana plug interfaces. Pins 1-8 of J54 are connected to pins 1-8 of JP1 in sequence.

[0075] like Figure 14 As shown, the active buzzer area includes an active buzzer of model TMB12A05 and a nickel-plated pure copper 2mm banana plug. Pins 1 and 2 of J63 are nickel-plated pure copper 2mm banana plug interfaces. The positive terminal of B1 is connected to pin 1 of J63, and the negative terminal is connected to pin 2 of J63.

[0076] like Figure 15 As shown, the adjustable non-polarized capacitor area includes a 6mm adjustable capacitor and a 2mm nickel-plated pure copper banana plug. C7, C8, and C17 are 6mm adjustable capacitors with sizes of 20pF, 60pF, and 120pF. Pins 1 and 2 of J43, J44, and J46 are 2mm nickel-plated pure copper banana plug interfaces. Pins 1 and 2 of J43, J44, and J46 are connected to the two ends of C7, C8, and C17, respectively.

[0077] like Figure 16As shown, the fixed resistor area includes resistors of model 0805 and nickel-plated pure copper 2MM banana socket, R28-R41 are 0805 resistors, R28, R31, R33 are 10K, R35, R37, R39 are 5.1K, R29, R32, R34 are 1K, R36, R38, R40 are 4.7K, pins 1-6 of RJ25-J28 are nickel-plated pure copper 2MM banana socket interfaces, pins 1-6 of J25 are connected to one end of R28, R31, R33, R35, R37, R39, pins 1-6 of J26 are connected to the other end of R28, R31, R33, R35, R37, R39. Pins 1-6 of J27 are connected to one end of R29, R32, R34, R36, R38, R40, pins 1-6 of J28 are connected to the other end of R29, R32, R34, R36, R38, R40.

[0078] As shown in Figure 17 The power supply area includes PPTC1812 resettable fuse, XH2.54 2P connector, MicroUSB edgeless positioning column female seat, 0805 resistor, 0805 LED, 2.54 single row pin socket, 2.54 single row pin, nickel-plated pure copper 2MM banana socket.

[0079] Pins 1, 2 of JP3 are nickel-plated pure copper 2MM banana socket interfaces for dry battery power input, one end connected to dry battery positive BAT, the other end connected to dry battery negative GND, J66, J67 are nickel-plated pure copper 2MM banana socket interfaces for power output, one end of 0805 resistor R71 connected to VCC, the other end connected to the positive electrode of LED D9, the negative electrode of LED D9 grounded, one end of PPTC1812 resettable fuse P1 connected to power supply VCC, the other end connected to pin 2 of three-position toggle switch MTS-103, pin 1 of three-position toggle switch MTS-103 connected to dry battery positive BAT, pin 3 connected to VCC pin of MicroUSB edgeless positioning column female seat J75, GND pin of MicroUSB edgeless positioning column female seat J75 grounded. Pin 1 of 2.54 single row pin socket JP4, JP5 grounded, pin 5 connected to VCC pin of MicroUSB edgeless positioning column female seat J75, pin 1 of 2.54 single row pin grounded, pin 5 connected to VCC pin of MicroUSB edgeless positioning column female seat J75, one end of 0805 resistor R78-R85 connected to VCC pin of MicroUSB edgeless positioning column female seat J75, the other end grounded.

[0080] As shown in Figure 18As shown, the fine adjustment potentiometer area includes a model RM065 potentiometer, a nickel-plated pure copper 2MM banana socket, wherein R49-R54 are RM065 potentiometers, and the resistance values are 100 ohms, 1K ohms, 5K ohms, 10K ohms, 50K ohms, 100K ohms, and 1000K ohms, respectively, and the pins 1, 2, and 3 of J48-J53 are nickel-plated pure copper 2MM banana socket interfaces, which are sequentially connected to the pins 1, 2, and 3 of R49-R54, respectively.

[0081] As shown in Figure 19 , the CP pulse area includes a model MTS-102 two-gear switch, an 0805 1K resistor, a nickel-plated pure copper 2MM banana socket, a SOP14 74LS00 NAND gate chip (U17), R72 and R73 are 0805 resistors, U17 is a 74LS00 NAND gate chip, J73 and J75 are nickel-plated pure copper 2MM banana socket interfaces, and S15 is a MTS-102 two-gear switch.

[0082] The pin 1 of MTS-102 is connected to the pin 1 of U17, the pin 2 is grounded, the pin 3 is connected to the pin 5 of U17, one end of R72 is connected to VCC, the other end is connected to the pin 5 of U17, one end of R73 is connected to VCC, the other end is connected to the pin 1 of U17, the pin 2 and the pin 6 of U17 are connected to J75, the pin 3 and the pin 4 of U17 are connected to J73, the pin 14 is connected to VCC, and the pin 7 is grounded.

[0083] As shown in Figure 20 , the 8-pin chip area includes a copper narrow-body 8P chip seat and a nickel-plated pure copper 2MM banana socket, wherein U5 and U6 are copper narrow-body 8P chip seats, and the pins 1-7 of J7-J10 are connected to a nickel-plated pure copper 2MM banana socket.

[0084] The pins 1-7 of J7 are sequentially connected to the pins 1-4 of the 8-pin chip U5,

[0085] The pins 1-7 of J8 are sequentially connected to the pins 5-8 of the 8-pin chip U5,

[0086] The pins 1-7 of J9 are sequentially connected to the pins 1-4 of the 8-pin chip U6,

[0087] The pins 1-7 of J10 are sequentially connected to the pins 5-8 of the 8-pin chip U6.

[0088] The teaching instrument is mainly used for the design and implementation of digital circuit, and the 14-pin chip area 1, 16-pin chip area 3 and 8-pin chip area 17 are different circuit chip plug-in areas, which can meet the commonly used 8-pin, 14-pin and 16-pin digital circuit chips, and the chip plug-in interface is surrounded by plug-in holes corresponding to the labels. When the chip is inserted, the plug-in interface around the chip connects the pins of the chip. When an external circuit is needed, a special lead can be directly inserted into the corresponding connection port. The high-low level output area 5 is a 12-way switching quantity signal output area, and the built-in circuit can provide high-low level signals controlled by switches. The CP pulse area 16 is an analog single pulse signal circuit, and the reserved plug hole leads out the pulse as the high-low level and pulse input signal of the 14-pin chip area 1, 16-pin chip area 3 and 8-pin chip area 17. The digital tube display area 2 is a result digital display area, which has six LED digital tubes, each of which can display "0-9" ten numbers and can be used in combination. It is composed of display decoding circuit and seven-segment light-emitting tube. Each tube has a display decoder with four input plug holes. When the chip output signal needs to be displayed, the chip output signal is connected to the display decoder input plug hole. The common cathode LED area 4 is an LED result display area, which has 12 LED light-emitting diodes. The cathode inside the diode is common ground, and the anode is connected to the plug-in reserved plate. When the high level is connected, the light is on, and when the low level is connected, the light is off. The active buzzer area 11 is a buzzer sound output area. When the chip output signal needs to be displayed, the chip output signal is connected to the corresponding input plug hole. The fine adjustment potentiometer area 15 is a fine adjustment resistor, the fixed value resistor area 13 is a fixed commonly used resistor, the adjustable non-polarity capacitor area 12 is an adjustable capacitor, the coarse adjustment potentiometer area 8 is a coarse adjustment resistor, the polarity capacitor area 7 is a polarity capacitor, and the non-polarity capacitor area 6 is a non-polarity capacitor. Each area has a sufficient number of different parameters of digital circuit commonly used resistors and capacitors, and the pin of each element is connected to the plug hole. When the main chip area circuit needs to be connected, it can be connected. The microphone area 9 is a microphone. When the circuit needs to input a sound signal, it is led out from here. The expansion area 10 is an expansion plug-in row. When the port of this version is not enough, it can be connected from here. The power supply area 14 is a power supply. The board provides two sets of power supply, one is connected through the USB interface, and the other is powered by the battery box on the board. The switch controls, and one is used at the same time. It can be randomly switched according to the use environment.

[0089] For example, to design a three-person voting circuit, two or more than two judges agree, the result is passed, otherwise the result is not passed, students use the design of the circuit, need to use and gate circuit 74LS08 and or gate 74LS32 digital circuit, are 14 pin chip, plug in 14 pin chip area 1, with special wire access from power supply area 14 power supply, input signal agree or disagree is equivalent to high and low level, signal from high and low level output area 5, such as chip corresponding input end, judge agrees, switch to high level side indicates agreement, to low level side indicates disagreement, chip output end connects LED of common cathode LED area 4, output high level when the light indicates that the pass, output low level when the light does not indicate that the pass, three-person voting circuit is connected, all possible verification circuit design can be operated, after completion, chip is taken down, wire is pulled down, the next circuit can be connected, the chip can be repeatedly used, similarly, different circuits use different chips, for example, a counting circuit needs to be connected, find the corresponding 74LS160 chip and insert it into the common cathode LED area 4, the counting pulse signal is connected from the CP pulse area 16, and the output counting signal is connected to the digital tube display area 2, so that the counting condition can be seen, for example, the doorbell circuit can be connected, the 555 chip used can be inserted into the 8-pin chip area 17, the resistors and capacitors needed are connected from the non-polar capacitor area 6, the polar capacitor area 7, the coarse adjustment potentiometer area 8, the adjustable non-polar capacitor area 12, the fixed resistor area 13 and the fine adjustment potentiometer area 15, and the output signal is connected to the active buzzer area 11, so that whether the doorbell circuit is realized can be verified, in the same way, different circuits need different chips, and different input signals used in digital circuits can be introduced from the corresponding area, different output display areas such as numbers, lights and sounds can be connected to display the results, the plug-in is convenient, the connection is flexible, different circuits can be realized, and when the plug-in interface of the board is not enough, the extension port of the extension area 10 can be used to connect external circuits.

[0090] The digital circuit teaching device of the embodiment has full functions, can realize all basic and design experiments of digital electronic technology, and can expand some comprehensive practice projects, the circuit board is compact in design and reasonable in layout, adopts a lifting type design, reduces power dissipation, is small in size, convenient to use, convenient to display, portable, and good in reliability.

[0091] The utility model is not limited to the implementation manner discussed above. The above description of the specific implementation manner is intended to describe and explain the technical scheme involved in the utility model. Any obvious transformation or substitution based on the utility model should be considered to fall within the protection scope of the utility model. The above specific implementation manner is used to disclose the best implementation method of the utility model, so that ordinary skilled persons in the art can apply various implementation manners and various alternative manners of the utility model to achieve the purpose of the utility model.

Claims

1. A portable digital electronic pocket practice box, characterized in that, It comprises a box body, the box body comprises a lower box body and an upper cover body, a lifting base is arranged in the accommodating cavity of the lower box body, a lifting assembly is connected above the lifting base, a bearing frame is arranged above the lifting assembly, an integral substrate is connected above the bearing frame, and 14-pin chip area, nixie tube display area, 16-pin chip area, common cathode LED area, high-low level output area, non-polarity capacitor area, polarity capacitor area, coarse adjustment potentiometer area, microphone area, expansion area, active buzzer area, adjustable non-polarity capacitor area, fixed value resistor area, power supply area, fine adjustment potentiometer area, CP pulse area and 8-pin chip area are arranged on the substrate in an integrated mode; the 14-pin chip area, the nixie tube display area, the 16-pin chip area, the common cathode LED area, the high-low level output area, the non-polarity capacitor area, the polarity capacitor area, the coarse adjustment potentiometer area, the adjustable non-polarity capacitor area, the fixed value resistor area, the fine adjustment potentiometer area and the 8-pin chip area are each respectively provided with multiple groups of area function modules; the 14-pin chip area, the 16-pin chip area and the 8-pin chip area are used for inserting 14-pin, 16-pin and 8-pin digital circuit chips; each element pin is led out of a jack for insertion and connection. It further comprises an external circuit which is in electrical communication with one or more of the 14-pin chip area, the nixie tube display area, the 16-pin chip area, the common cathode LED area, the high-low level output area, the non-polarity capacitor area, the polarity capacitor area, the coarse adjustment potentiometer area, the adjustable non-polarity capacitor area, the fixed value resistor area, the fine adjustment potentiometer area and the 8-pin chip area.

2. The portable digital electronic pocket practice box according to claim 1, characterized in that, The lifting base comprises bent rib plates connected to the two sides of the bottom of the lower box body, the bent rib plates are respectively connected to main support rods and auxiliary support rods through pin shafts, a waist-shaped hole is arranged in the middle of the main support rod, the other end of the auxiliary support rod is connected to the main support rod through a pin shaft, the upper end of the main support rod is connected to the bearing frame, movable blocks are arranged on the two sides of the bearing frame corresponding to the main support rod, a screw rod is threadedly connected to the inside of the movable block, a nut and a rotating handle are connected to the other end of the screw rod, and the nut is fixedly connected to the front side of the bearing frame.

3. A portable digital electronic pocket practical box according to claim 1, characterized in that, The nixie tube display area comprises a decoder chip, a nickel-plated pure copper 2MM banana socket, 0805 chip resistors, a common cathode nixie tube and a six-grade dial switch.

4. A portable digital electronic pocket practical box according to claim 1, characterized in that, The common cathode LED area comprises a light-emitting diode, 0805 chip resistors with a resistance of 1K and a nickel-plated pure copper 2MM banana socket; the high-low level output area comprises a three-grade dial switch and a nickel-plated pure copper 2MM banana socket; the non-polarity capacitor area comprises a non-polarity capacitor and a nickel-plated pure copper 2MM banana socket; and the polarity capacitor area comprises a direct-insertion aluminum electrolytic capacitor and a nickel-plated pure copper 2MM banana socket.

5. A portable digital electronic pocket practical box according to claim 1, characterized in that, The coarse adjustment potentiometer area comprises a coarse adjustment potentiometer and a nickel-plated pure copper 2MM banana socket, and the interface of the nickel-plated pure copper 2MM banana socket is connected to the pin of the coarse adjustment potentiometer.

6. A portable digital electronic pocket practical box according to claim 1, characterized in that, The microphone area includes a capacitive electret microphone and a nickel-plated pure copper 2MM banana socket, the positive electrode of the capacitive electret microphone is connected to one side pin of the nickel-plated pure copper 2MM banana socket, and the negative electrode is connected to the other side pin; The active buzzer area includes an active buzzer and a nickel-plated pure copper 2MM banana socket, the positive electrode of the active buzzer is connected to one end pin of the nickel-plated pure copper 2MM banana socket, and the negative electrode is connected to the other end pin.

7. A portable digital electronic pocket practical box according to claim 1, characterized in that, The adjustable non-polar capacitor area includes an adjustable capacitor and a nickel-plated pure copper 2MM banana socket connected by electricity; The fixed resistance area includes a resistance and a nickel-plated pure copper 2MM banana socket connected by electricity.

8. A portable digital electronic pocket practical box according to claim 1, characterized in that, The power supply area includes a recoverable fuse, a 2P connector, a no-edge positioning column female seat, a resistance, a light-emitting diode, a single-row pin socket, a single-row pin, and a nickel-plated pure copper 2MM banana socket connected by electricity.

9. A portable digital electronic pocket practical box according to claim 1, characterized in that, The fine adjustment potentiometer area includes a potentiometer and a nickel-plated pure copper 2MM banana socket, and the pins of the potentiometer are connected to the interface of the nickel-plated pure copper 2MM banana socket.

10. A portable digital electronic pocket practitioner's kit according to claim 1, wherein, The CP pulse area includes a two-grade switch, a resistance, a nickel-plated pure copper 2MM banana socket, and an NAND gate chip connected by electricity; The expansion area includes an 8P row pin and a nickel-plated pure copper 2MM banana socket, and the pins of the 8P row pin are connected to the interface of the nickel-plated pure copper 2MM banana socket in sequence.

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